Which category does NOT require specialized control markings?

The category that does not require specialized control markings is public information. This category refers to information that is generally available to the public and does not contain any sensitive data that needs to be protected from unauthorized access. As such, public information does not require the same stringent marking practices that are necessary for information that falls under categories like Special Access Programs, Intelligence, or Domestic Security, which contain sensitive or classified details that need to be clearly identified and protected to prevent unauthorized disclosure or access. Public information is typically already deemed safe for public release, so there is no need for additional control markings.